Well drill jar



De@ 19 w22.

T W. BELL .v

WELL DRI LL JAR A Fl LED MAR. 16. 922.

/6 JW.' l

Patented Des, Egg @22 sanear sa? emana easier.;

THOMAS W. BELL, F SISTERSVUJLE, WEST VIIEtGlIA.V

WELL DRILL TAIB.

Appuatinmed nieren 1s, 1922. seriaino. 544,297.

, To alli-whomzt may lowing is a specification.v

' tion; and

' This invention aims to providea well drill jar so constructed that there will be three cooperatingimpact surfaces on the body of the jar and ,on the plunger thereof. j Another object of the inventionis to provide a well drill jar, .the operation of whigh will not be impeded by dirt or liquid which may Afind its way into the body ofthe device.

A' further object of the invention is to I provide a jar which maybe shed out without difficulty, should any' parts thereof become broken.

In the drawings Figure 1 shows in longitudinal section, a device constructed in accordance'with the invention, the plunger remaining in eleval 2 is an elevation, wherein the plunger is loweredfrom the position of Figure 1. Fig. 3 is a section of the lower chambered portion through openings 9.

In carrying out the invention, there is provided a body 1 equipped in its upper end' with an upper bore 2 communicatlng with a reduced passage 4, there being a first shoulder 3 1n the body 1 at the upper end of the passage 4. The passage 4 communi- 'cates with an enlarged lower bore 5, there being an upper shoulder 6 at the upper end of the lower= bore 5. The lower bore 5 communicates with a reduced chamber 7, there being a lower shoulder 8 atthe lower end of thebore 5. The body 1 has any desired ,number of lateral outlets 9' communicating with the lower end of the chamber 7. The

body 1 is reduced in diameter to form wrench surfaces 10, and to form an external application 1s free from welds, and is assemshoulder 11, the outlets 9 opening downwardly through the shoulder 11, and a clogging of the outlets beingthereforc unlikely. At its lower end, 'the body 1 is supplied with the usual connecting socket 12. The bodyV 1 has any desired number of lateral upper outlets 25, communicating with the upper bore 2 adjacent to the lowerend thereof.

The tool includes a plunger I14 supplied at its upper end with the usual connecting screw 22. The plunger 14 comprises a head 15 which is reduced yin diameter intermediate its ends to form wrench surfaces 16. A

- ioning of 'reduced shank 17 extends downwardly from the head 15. `A reduced neck 18 extendsv downwardly from the shank 17 and .defines a first shoulder 19 at the lower end of the' shank 17. The neck 18 is provided at 'its lower end with anl enlarged foot 20. The head 2O is mounted slidably in the lower bore 5 of the bore 1. The neckv 18 of the plunger is mounted slidably in the passage 4, of the body 1. The shank 17 is mounted slidably in the upper bore 2v of the body 1.

In practicaloperation, when theplunger 14 moves downwardly', the head 15 engages constituent material of the tool .is not likely to be distorted by iinpact,such 'a distortion resulting in a jamming or a binding of the plunger in-the body 1. Y

Any dirt which-may iindits way into the u per bore 2 will be forced outwardly tlliough the outlets 25. Liquid which finds its way into the lower bore iwill.y be-.refA

ceived in the chamber 7 `on the down stroke of the plunger, and will `pass outwardly through the outlets 9, there being no cushthe plunger, on its downward stroke. Y 1 v `When the lunger 14 is raised suiiiciently, the upper end of the'foot 20 on the plunger will engage the shoulder 6 on .the body 1, thereby permitting the body to be lifted out of the hole, along with the'plunger.

The device is so constructed that it will not be likely to break, even under severe and long continued use, but if any 'portion of the tool should break, th'epart of the tool. in the well may be :fishedout readily.`

The jar forming the subject matter of this bled by the swaging process well known in the blacksmithing art. e

There may be any desired number of the ges the sh'oulder 3 bore, there being a' loo.

first shoulder at the upper end of the passage, and an upper shoulder at the upper end ofthe lower bore; and a plunger slidable in the body and including a head, a reduced shank projecting from the head, a reduced neck projecting from the shank and forming a shoulder in the plunger, and an enlarged foot on the lower end of the neck, the foot engaging the body at the lower end of the lower bore, the shoulder on the plunger engaging the rst shoulder in the body, and the head engaging the upper end of the body, simultaneously, on the down stroke of the plunger, and the foot being adapted yto cooperate with the upper shoulder of the body, when the plunger is raised suliciently.

2. A device of the class described, constructed as set forth in claim 1, and further characterized by the fact that the body is provided with a reduced chamber communicating with the lower bore, the body having` a lateral outlet leading from the chamber.

3. A device of the class described, constructed as set forth in claim 1, and further characterized by the fact that the body has a lateral outlet communicating with the upper bore.

In testimony that I claim the foregoing as my own, I have hereto aHiXed my signature in the presence of two witnesses.

THOMAS W. BELL. `Witnesses JOHN H. McCoY, EFFIE M. CUMMINGS. 

